<div class="a">das</div><div class="a">fsdg</div>var del=document.getElementsByClassName('a');for(var i=0;i<del.length;i++){
console.log(del[i].id);
}console.log(del[i].id);為什么打印不出id?
document.getElementsByClassName獲取的元素集合拿不到id?
叮當(dāng)貓咪
2018-07-23 20:08:31